( Reaffirmed 2012 ) IS : 8699 - 1977 Indian Standard SPECIFICATION FOR PVC COATED FABRICS FOR FOOTWEAR INDUSTRY Treated Chairman SHRI Fabrics Sectional Committee, Repusenting PCDC 16 S. L. GANDHI Members Ministry of Defence ( R & D ) Directorate General of Technical Development, New Delhi DR V. R. B. MAT~UR ( Alternate ) Basant Pran Electric Co Pvt Ltd, Calcutta SHRI BASANT KUMAR SHRI R. S. K~LRA ( Alternate ) Bengal Waterproof Works ( 1940 ) Ltd, Calcutta SHRI A. BOSE Bayer ( India ) Ltd, Bombay DR S. N. CKAKRAVARTY SHRI R. R. PANDIT ( Altrrnate ) DF,;T,~; DIRECTOR ( RUBBER ), Railway Board ( Ministry of Railways ) CHEMIST AND METALLURGIST, ICF ( Alternate ) Caprihans ( India ) Pvt Ltd, Bombay SHRI 2. S. KAJIJI Kamdar Pvt Ltd, Bombay SHRI B. M. RAMDAR SHRI V. B. KAMDAR (Alternate ) Macneill & Barry Ltd ( Kilburn Division ), SRRI SURESH C, MARWAHA Calcutta SHRI P. S. JAYARAMAN ( Alternatc ) Ahmadabad Textile Industry's Research Association, SHRI H. U. MEHT+ Ahmadabad National Test House, Calcutta SHRI S. P. MULLICK SIIR~ A. GEOSH ( Alternate ) Ministry of Defence ( DGI ) SHRI NIRMAL SIN~H SHRI M. KUMARAN ( Alternate ) The Bhor Industries Ltd, Bombay SHRIRAMAN M.PATEL Directorate General of Mines Safety, Dhanbad SHRI S. S. PRASAD SHRI A. C. SRIVASTAVA ( Alternate ) SHRI P. RAMADAS SHRI HADI ALI ( Alternata ) Central Warehousing Corporation, New Delhi SHRI ANIL AGARWAL Shri S. L. Gandhi j SRRI C. D. ANAND ( Alternate to ( Continued on page 2 ) @ CopVright 1978 STANDARDS INSTITUTION INDIAN This publication is protected under the Indian Copyright Aci ( XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act. IS : 8699 - 1977 (Continued from page 1 Members SHRI B. ROY &RI B.P.SENQUPTA / ) Representing East India Rubber Works Pvt Ltd, Calcutta Directorate General of Supplies and Disposals, New Delhi SHRI S. C. BAKSRI ( Alternate ) Director General, IS1 ( E,u-ojicio Member ) DR G. M. SAXENA, Director ( Chem ) Secretary SHRI S. ARAVAMUDHAN Deputy Director ( Chcm ), ISI Leatherite Convener S=RI R. SRINIVA~*N Members DR B. R. C. ANAND SHRI S. MITRA ( Alternate ) SRRI s. N. CHAWLA DEPUTY Subcommittee, PCDC 16 : 2 Varma Industrials Ltd, Bangalorc Calico Chemicals Bombay ( Plastics and Fibres Division ), DIRECTOR ( RUBBER ) SERI W. G. EnoAR The Association of State Road Transport Undertakings, New Delhi Research, . Designs & Standards Organization ( Mmistry of Railways ), Lucknow Ministry of Defence ( DGI ) Ministry of Defence ( R & D ) Ltd, Snnr M. KUMARAN ( Altarnate ) SHRI S. L. GANDHI Sxns N. KANNAN ( Aftemrrte ) SHRI s. S. GATTANI SHRI P. J. HALFVASIA SHRI BRI~MOHAN KHANNA Snn~ S. P. M~HTA ( Alternate ) East India Rubber Works Pvt Ltd, Calcutta SHRI B. Roy Snns PURSHOTTAYDASKHEMKA ( Alternate ) Directorate General of Supplies & Disposals, &RI B. P. SENGUPTA New Delhi SHRI A. K. MANDAL ( Alternate ) The Bhor Industries Ltd, Bombay SARI J. M. SHROFF Caprihans India Ltd, Bombay SHRI S. K. VERU Chemicals & Plastics India Ltd, Madras The Elphinstone Spg & Wvg Mills CO Bombay Shiv Laminating & Coating Pvt Ltd, Bombay 2 IS : 8699 - 1977 Indian Standard SPECIFICATION FOR PVC COATED FABRICS FOR FOOTWEAR INDUSTRY 0. FOREWORD 0.1 This Indian Standard was adopted by the Indian Standards Institution on 29 November 1977, after the draft finalized by the Treated Fabrics Sectional Committee had been approved by the Petroleum, Coal and Related Products Division Council. 0.2 In pre-war days, nitrocellulose and linseed oil coatings on woven fabrics were used for shoe upper but they were not so satisfactory because of poor flex-resistance. Then by stages came solid PVC coatings; expanded vinyl coated fabrics and polyurethanes; microporous vinyl fabrics; synthetic fabrics and laminates. At present in India, only PVC coated fabrics ( either solid or expanded coating ) are being used in footwear industries. These materials are being used for upper and lining for certain type of shoes and chappals, for socks or cover materials for insoles, etc. 0.3 PVC coated fabrics consist of PVC polymer/co-polymer which is either calendered and then laminated or is spread undyed textile material. composition on to dyed/ 0.3.: Non-expanded PVC coated fabrics are manufactured by applying to one side of a woven cloth a substantially continuous solid coating of suitably plasticized, stabilized and pigmented polymer of vinyl chloride or a copolymer the major constituent of which is vinyl chloride or a combination of both. 0.3.2 Expanded PVC coated fabrics are manufactured sirnilar to that of non-expanded PVC, but part of the coating is foamed so that it forms a continuous expanded layer between the top skin and the base fabric. 0.4 This standard does not at present include requirements for PVC coated fabrics based on non-woven materials, knitted fabric backing and the coating without a continuous skin. It is recognized, however, that such materials may be used in future and it is proposed to make suitable additions in due course. 0.5 This standard contains clauses 4.3, 4.4.1, call for an agreement between the purchaser 4.4.2, 4.5.1 and 4.6.1 which and the supplier. IS :8699 - 1977 0.6 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the resuli of a test or analysis, shall be rounded off in accordance with IS : 2-1960*. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. 1. SCOPE the requirements, methods of sampling and industry coated on woven ( grey These coated fabrics may be in plain, embossed, or dyed ) fabrics. printed or in any other surface finish. 1.1 This standard prescribes test for PVC coated fabrics for footwear 2. TERMINOLOGY 2.0 For the purpose of this standard, 19721 and the following shall apply. the definitions given in IS : 2244 with a coating coated fabrics 2.1 Printed PVC Coated Fabrics - PVC transparent or coloured surface continuous or discontinuous, including all multitone effects and lacquer finished fabrics. 2.2 Standard Atmospheric Conditions for TestingAn atmosphere with a relative humidity of' 65 f 5 percent and a temperature of 27 f 2°C. 3. TYPES AND GRADES shall be of two types: coated PVC fabric, nominal thickness in 3.1 The material PVC a) Type A - Expanded range ofO.8 to 1.9 mm. b) TY@ B Non-expanded coated fabric. 3.1.1 Type A fabrics are manufactured in the following four grades, which are distinguished according to requirements set out in Table 1. The main uses of these grades are given below: a) Grade 1 shoes. b) Grade 2 c) Grade 3 mainly used as upper material for gents shoes. for insole. or cover for and ladies used as upper material mainly used as a lining for children or a cover material material tGlossary d) Grade 4 - mainly used for socks or lining insole in ordinary footwear. ~_~ -e-y *Rules for rounding off numerical values ( raised ). of terms relating to treated fabrics. 4 IS : 8699 - 1977 3.1.2 Type B fabrics are manufactured distinguished according to requirements uses Of* these grades are given below: in following four grades and is The main set out in Table 2. and chappal for chappals straps. and also lining 4 Grade I b) Grade 2 materials For shoe uppers, sandals straps For upper for shoes. and Grade 3 - For socks or insole cover in medium quality It is also used in shoe uppers of ordinary usage. Grade 4 - For ordinary socks or as a binding also used as insole cover for ordinary footwear. 4. REQUIREMENTS 4.1 The finished material of Type A and Type B shall requirements given in Table 1 and Table 2 respectively. comply material. footwear. This is with the 4.2 Appearance - The material shall be of uniform surface finish and shall contain no bubbles, blisters, and shall be substantially free from foreign matter when a test piece one metre long and having the width of the material is cut from the sample and placed on a flat illuminated surface suitable for showing up defects. Edges shall be smooth and free from cuts. 4.3 Colour, Grain, Embossing and Finish - The colour, grain and finish of the material whether in single colour or multi-colour affects, shall be as agreed between the p,urchaser and the supplier. Details regarding the procedure and the standard conditions for comparing colours are described in Appendix A of IS : 1259-1977" which is recommendatory. 4.4 Coatiug - The compound used for coating shall be made from suitably compounded vinyl chloride polymer or co-polymer. It shall be pigmented to meet specified colour requirements. The coating shall be uniformly applied on one side of the base fabric and shall be substantially free from pinholes, cracks and other flaws. It shall be on the back side of cotton base fabric in case of Grades 1 and 2. The coating shall satisfy the requirements given in 4.4.1 to 4.4.5. 4.4.1 Resistance to Cold - The coating shall withstand a bending test around 6 mm diameter steel pin without cracking after an exposure of one hour at 0 & 2°C or lower tempera.ture as agreed between the purchaser temperature ___-- and the supplier. The steel pin shall also be kept and the test shall be done as quickly as possible. fabrics ( second revision ). at test *Sprcification for vinyl coated 5 TABLE 1 REQUIREMENTS FOR EXPANDED PVC FOOTWEAR INDUSTRY ( TYPE ( Clauses 3.1.1 and 4.1 ) COATED A) FABRICS FOR CHARACTERISTIC REQUIREMENT FOR r_-_-_-_-_h----_m---_7 Grade 1 Grade 2 Grade 3 (3) 90 1 250 (4) 90 1 000 (5) 122 750 METHOU OF TEST, REF TO IS: Grade 4 (6) 122 550 (7) 7016 ( Part I )-1973* do 7016 ( Part II )-1973t (1) i) ii) iii) (2) Usable width, cm, Min Total mass, Min, g/m* Breaking strength, width: Warp direction Weft direction Min, kg/5-cm 80'0 65.0 by flexing cycles in 100 150 60.0 35.0 37'5 25.0 25'0 20.0 7016 ( Part IV)-19731 ( Method 1 ) iv) Resistance to damage flexing (No. of thousands ) , Min: Stage I Stage II 100 150 1'4 to 1.6 20 40 1.2 to 1.4 20 40 680 to I.10 7016 ( Part I )-1973* v) Thickness, mm 1.7 to 1'9 *Methods tMethods *Methods of test for coated and treated fabrics: Part I Determination of roll characteristics. of test for coated and treated fabrics: Part II Determination of breaking strength and extension at break. of test for coated and treated fabrics: Part IV Determination of resistance of damage by flexing. TABLE 2 REQUIREMENTS FOR NON-EXPANDED PVC COATED FOOTWEAR INDUSTRY (TYPE B ) ( Clauses 3.1.2 and 4.1 ) ---7 Grade 4 (6) 122 480 REQUIREMENT FOR ?_----_---A_--____ Grade 1 Grade 2 Grade 3 (3) 125 900 kg/5-cm 80 65 by flexing cycles in 100 150 100 20 40 20 40 60 35 37'5 25 25 20 (4) 125 500 (5) 122 700 FABRIC FOR SL No. (1) i) ii) iii) CHARACTERISTIC METHOD OF TEST, REF TO IS: (7) 7016 ( Part I j-1973* do 7016 ( Part II)-19737 (2) Usable width, Min, cm Total mass, Min, g/ma Breaking width: strength, Min, Warp direction Weft direction ti iv) Resistance to damage flexing ( No. of thousand ), Min: Stage 1 Stage 2 7016 ( Part IV )-19738 ( Method 1 ) . 150 *Methods of test for coated and treated fabrics: Part I Determination of roll characteristics. iMethods of test for coated and treated fabrics: Part II Determination of breaking strength and extension at break. $Methods of test for coated and treated fabrics: Part IV Determination ef resistance of damage by flexing. IS : 8699 - 1977 4.4.2 Colour Fastness to Dry and Wet Rubbing - The coating shall not stain an undyed cotton fabric of specified count when tested as prescribed in Appendix C of IS : 1259-1977*. material are not likely to withstand NOTE - Metallic shades and printed However, when this test is required for metallic shades, the number of cycles shall be as agreed to between the purchaser and the supplier. this trst. abrading 4.4.3 Colour Fastness to Light - The test pieces shall be subjected to colour fastness to daylight according to Appendix D of IS : 1259-1977". However, in case of any dispute the test specimens shall be subjected to accelerated fading test as stipulated in Appendix E of IS : 1259- 1977*. For this standard, the material shall be considered satisfactory when colour fastness of any test piece shall be rated not less than No. 4 of standard pattern of plain dyed woollen fabrics as prescribed in IS : 68:~1957-1. The effect on printing may be observed in case of printed material. 4.4.4 Resistance to Heat and Loss of Mass of Coating on Heating - The coating shall withstand an exposure of 24 hours in an air-oven at 100 f. 2°C without showing signs of exudation or stickiness when tested as prescribed in Appendix B of IS : 1259-1977*. The loss of mass shall be not greater than 3 percent. 4.4.5 Stability at Vulcanization Temperature - A specimen 100 cm2 is kept in an air circulating oven, coated side facing upwards on a wire mesh. After exposure for 45 minutes at 14O"C, the specimen shall be removed from the oven alongwith the wire mesh, taking care not to disturb the It shall be cooled in the standard atmosphere for 30 minutes coating. The coating surface shall not show any tackiness or any and examined. deterioration in shade. 4.5 be Resistance to Gelling - A test specimen of convenient size shall double folded ( coated surface outer most ) and dipped in acetone for 30 seconds. The specimen shall then be removed from acetone and laid on a flat rigid surface with coated side upper most for drying in standard atmosphere. After drying the coating shall be examined for appearance of cracks due to immersion in acetone. NO crack shall be evident. shall be uniformly purchaser and the 4.5.1 Embossing and Grain - The finished material embossed or grained as agreed to between the supplier. 4.6 Adhesion of Print ( for Printed examined as described in Appendix G cycles to remove either the printed material shall be greater than five ( 10 t$fethods PVC Coated Fabrics ) -- When of IS : 1259-1977*, the number of pattern or any area of printed strokes of abrading member ). to day light. *Specification for vinyl coated fabrics ( Jecond revision ), of determination of colour fastness of textile materials 8 IS : 8699 - 1977 4.6.1 In case shall be supplier. subject of metallic and white printing inks, adhesion to the agreement between the purchaser of print and the 4.7 Adhesion of Coating - The plies shall not separate more than 10 mm in a load of 27'5 N (2.75 kgf ) in any of the test pieces taken when tested as prescribed in Appendix H of IS : 1259-1977*. 5. PACKING, AND MARKING, STORAGE NUMBER OF CUTS IN THE ROLL 5.1 Packing - The material shall be securely roll so as to ensure safe transportation. packed in the form of a 5.2 The material shall be in rolls of minimum of 15 metres lengths. Short lengths shall be not more than one per roll. Further, no short length shall be less than 5 metres in length. In any consignment not more than 10 percent shall contain short lengths. 5.3 Marking - The material shall be marked at the outer end of each roll with the manufacturers' name or trade mark, if any; month and year of manufacture; length of material in metres and the grade and type. 5.3.1 Mark. The material may also be marked with the IS1 Certification NOTE -The use of the IS1 Certification Mark is governed by the provisions of the Indian Standards Institution ( Certification Marks ) Act and the Rules and Regulations made thereunder. The IS1 Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply w.ith the requirements of that standard under a well-defined system of inspection, testing and quality control which is devised and supervised by IS1 and operated by the producer. IS1 marked products arc also continuously checked by IS1 for conformity to that standard as a further safeguaid. Details of conditions under which a licence for the use of the IS1 Certification Mark may be granted to manufacturers or processors, may be obtained from the Indian Standards Institution. 5.4 Storage - PVC coated fabrics shall be stored vertically on dry, clean, firm and level surface in a ventilated place not exposed to direct sunlight and protected from dust, moisture, corrosive and solvent fumes. 6. SAMPLING AND CRITERIA FOR CONFORMITY 6.1 Sampling all the rolls of PVC coated fabric of 6.1.1 Lot - In any consignment, the same grade, type, colour and finish shall be grouped together and each such group shall constitute a lot ( a roll is normally about 15 m minimum in length for Type A and 20 m minimum in length for `Type B). *Specification for vinyl coated fabrics ( second revision ). 9 IS : 8699 - 1977 6.1.2 The conformity of the lot to the requirements of this specification The number of rolls to be shall be ascertained for each lot separately. selected at random shall be in accordance with Table 3. TABLE LOT SIZE 3 SCALE OF SAMPLING No. OF ROLLS TO BE SELECTED n 2 3 4 5 N up to 100 101 I> 200 201 1, 300 301 and above 6.1.3 The rolls shall be selected at random and to ensure randomness of selection, the procedure recommended in IS : 4905-1968* shall be followed. 6.2 Number 6.2.1 of Tests From each of the rolls selected according to 6.1.3 one metre length (measured between two weft threads) of PVC coated fabric shall be cut, care being taken to exclude not less than 0.25 m length of fabric The specimens necessary for various tests, specified in from either end. the standard shall be cut from the lengths of PVC coated fabric thus obtained. All the samples shall be kept out of contact from each other or any other material that may cause contamination. Scheme of selection of test specimens from the sample length is given in Fig. 1. 6.2.2 Each of the lengths obtained from a lot shall be examined for visual defects and coating and if found satisfactory, further tests as specified shall be carried out. 6.2.3 Tests for determination of all other characteristics specified in this standard shall be conducted on each of the test specimen cut from these lengths as obtained in 6.2.1. 6.2.4 For levels of control for colour fastness to light ( see 4.4.3 ) the frequency of sample selection shall be each shade every month and also at the time of changes of composition for various shades. 6.3 Criteria for Conformity 6.3.1 The lot shall be declared as conforming to specification for various characteristics, if for each of the characteristics, the test results on all individual specimens are found to be within limit of the specification. ~ _~~ ~__*Methods for random sampling. I 10 IS : 8699 - 1977 L80cm , 90 cm .f . -5cm P = Specimen T = Specimen in the warp direction in the wrfr direction 1 = Total mass and loss in mass on heating 2 = Breaking 3 = Resistance 4 = Resistance strength to damage by flrxing to cold 5 = Colour fastness to dry and wet rubbing 6 = Colour fastness to light 7 = Resistance 8 = Stability 9 = Resistance to heating at vulcanization to gelling temperature 10 = Adhesion of coating 11 = Adhesion of print FIG. 1 SCHEME FOR SELECTIONOF TEST SPECIMENS 11 . 6.3.2 If the specimen, taken from a one metre length, fails in one or more tests, each such tests shall be repeated twice. For this purpose two more one metre lengths shall be taken from the roll, and these specimen shall be cut from each of them so that duplicate tests may be conducted If all the specimens pass the duplicate tests, in respect of each failure. the lot shall be declared conforming to the specification, otherwise not.